A method for optimal control of sewage treatment by adding carbon sources

Abstract

The invention discloses a sewage treatment optimization control method for adding carbon sources, which belongs to the technical field of waste water biological treatment, including: S1, writing the increased dynamic expression into the simulation software containing the ASM2d model, combining the ASM2d model to construct ASM2e model; S2, using the process component units in the ASM2e model library to construct a sewage treatment process; S3, converting the influent water quality concentration into the component concentration of the ASM2e model, and conducting a preliminary steady-state simulation of the sewage treatment process; S4, according to the preliminary The results of the steady-state simulation and the sensitivity analysis are used to calibrate the kinetic parameters and chemometric parameters of the ASM2e model to realize the steady-state simulation; S5, the steady-state simulation results are used as the initial input value of the dynamic simulation to perform dynamic influent water quality Dynamic simulation analysis. The method is suitable for simulating and optimizing operation of nitrogen and phosphorus removal effects in sewage treatment systems where sodium acetate exists in anoxic or aerobic regions.

Description

technical field [0001] The invention relates to the technical field of wastewater biological treatment, in particular to a method for optimizing control of sewage treatment by adding carbon sources. Background technique [0002] With the development of industry and agriculture, in order to protect the environment, sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering and other fields. At present, the activated sludge ASM2d model introduced by the International Water Association (IWA) is generally used in the sewage treatment process. Compared with other models, this model is more accurate in simulating the dynamics of nitrate and phosphorus and phosphorus salts. It is widely used in sewage treatment systems with nitrogen and phosphorus removal functions. Based on the ASM2d model and with the help of computer technology, the optimal operation of the sewage tr...

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Problems solved by technology

[0003] However, the ASM2d model is more complex, and the amount of calculation is large during operation

In order to reduce the complexity of the model, some simplification methods are introduced to the ASM2d model. These simplification methods directly lead to some defects in the ASM2d model during operation. For example, when the simulation system runs under certain conditions, the ASM2d model does not adapt to

[0004] In addition, there is an important defect in the ASM2d model: it cannot simulate the process of sodium acetate and other acetic acid substances in the anoxic tank and aeration tank

[0006] Therefore, the applicability of the ASM2d model in the actual sewage treatment process of adding sodium acetate is not strong, and it does not meet the characteristics of my country's sewage treatment industry

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